My boyfriend introduced me to his dad and friends but his room is full of things from his ex?

So my boyfriend asked me last week to watch his dogs and stay with him for a long weekend. Witch meant I meet his dad (he was going on holiday )and his best friend since he was visiting , and stayed in his home for five days . It was not the first time I stay there but it’s the first time i notice some things suck as make up in the bathroom female handbag and jewelry boxes and the highlight when I opend the closet woman close many of them even in the underwear drawer (I only open to grab a T-shirt and was just in shock ) I confronted him about it and he said you know she lived here with me and my dad for a year but it’s long over (she left him September 2016) anyway he said he just didn’t care and promised to clear out . But isn’t it major fucked up you bring me into your home i meet your dad (big step ) and still your ex shit is lying around ? Am I over reacting ?